▎ 摘　　要

Li4Ti5O12 was prepared by solid-state reaction, graphene oxide was synthesized by the Hummers' method and then it was reduced by N2H4 center dot H2O to obtain graphene. High-energy ball milling was adopted to prepare Li4Ti5O12/graphene composite. The crystalline structure, morphology, composition and electrochemical properties of the composite were characterized by XRD, SEM, TEM and half cell charge-discharge. Among the as-synthesised composites, Li4Ti5O12 particles uniformly clung to the graphene sheets. Because graphene has good electrical conductivity, the composite presents excellent rate performance and high cyclic stability. The specific capacity of composites is as high as 120.2 mAh.g(-1) when they cycled at 20 C, whereas that of the pristine Li4Ti5O12 particles is only 57.6 mAh.g(-1). The excellent electrochemical performance is attributed to the decrease in the charge-transfer resistance.